In this Jan. 4, 2013 photo, evidence of sliding snow is seen in steep terrain near a ski area at Snoqualmie Pass in Washington state. Where backcountry safety education once stressed the mechanics of avalanches and snow science, training courses now incorporate a focus on human factors such as how to make better decisions, manage group dynamics and speak up should danger arise. (AP Photo/Ted S. Warren)

In this Jan. 4, 2013 photo, instructor Dave Jordan, right, teaches an avalanche safety course on Snoqualmie Pass in Washington state. Where backcountry safety education once stressed the mechanics of avalanches and snow science, training courses now incorporate a focus on human factors such as how to make better decisions, manage group dynamics and speak up should danger arise. (AP Photo/Ted S. Warren)

In this Jan. 4, 2013 photo, instructor Dave Jordan, kneeling at left, leads students using avalanche scanners toward a target backpack with a transmitter in it as he teaches an avalanche safety course on Snoqualmie Pass in Washington state. Where backcountry safety education once stressed the mechanics of avalanches and snow science, training courses now incorporate a focus on human factors such as how to make better decisions, manage group dynamics and speak up should danger arise. (AP Photo/Ted S. Warren)

In this Jan. 4, 2013 photo, instructor Dave Jordan demonstrates the use of an avalanche scanner, right, to find an avalanche transmitter, left, as he teaches an avalanche safety course on Snoqualmie Pass in Washington state. Where backcountry safety education once stressed the mechanics of avalanches and snow science, training courses now incorporate a focus on human factors such as how to make better decisions, manage group dynamics and speak up should danger arise. (AP Photo/Ted S. Warren)

In this Jan. 4, 2013 photo, instructor Trevor Kostanich teaches an avalanche safety course at Snoqualmie Pass in Washington state. Where backcountry safety education once stressed the mechanics of avalanches and snow science, training courses now incorporate a focus on human factors such as how to make better decisions, manage group dynamics and speak up should danger arise. (AP Photo/Ted S. Warren)

In this Jan. 4, 2013 photo, instructor Trevor Kostanich teaches an avalanche safety course at Snoqualmie Pass in Washington state. Where backcountry safety education once stressed the mechanics of avalanches and snow science, training courses now incorporate a focus on human factors such as how to make better decisions, manage group dynamics and speak up should danger arise. (AP Photo/Ted S. Warren)

In this Jan. 4, 2013 photo, instructor Trevor Kostanich teaches an avalanche safety course at Snoqualmie Pass in Washington state. Where backcountry safety education once stressed the mechanics of avalanches and snow science, training courses now incorporate a focus on human factors such as how to make better decisions, manage group dynamics and speak up should danger arise. (AP Photo/Ted S. Warren)

In this Jan. 4, 2013 photo, Dave Jordan, right, teaches an avalanche safety course on Snoqualmie Pass in Washington state. Where backcountry safety education once stressed the mechanics of avalanches and snow science, training courses now incorporate a focus on human factors such as how to make better decisions, manage group dynamics and speak up should danger arise. (AP Photo/Ted S. Warren)

In this Jan. 4, 2013 photo, Steve Hamill, second from right, uses an avalanche scanner to look for a target during an avalanche safety course held on Snoqualmie Pass in Washington state. Where backcountry safety education once stressed the mechanics of avalanches and snow science, training courses now incorporate a focus on human factors such as how to make better decisions, manage group dynamics and speak up should danger arise. (AP Photo/Ted S. Warren)

In this Jan. 4, 2013 photo, Students using avalanche scanners look for a target during an avalanche safety course held on Snoqualmie Pass in Washington state. Where backcountry safety education once stressed the mechanics of avalanches and snow science, training courses now incorporate a focus on human factors such as how to make better decisions, manage group dynamics and speak up should danger arise. (AP Photo/Ted S. Warren)

In this Jan. 4, 2013 photo, instructor Dave Jordan, front left, leads students using avalanche scanners toward a target backpack with a transmitter in it as he teaches an avalanche safety course on Snoqualmie Pass in Washington state. Where backcountry safety education once stressed the mechanics of avalanches and snow science, training courses now incorporate a focus on human factors such as how to make better decisions, manage group dynamics and speak up should danger arise. (AP Photo/Ted S. Warren)